JPS6127231Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a working/standby switching radio device, and particularly to a working/standby switching circuit with low power consumption.

FIG. 1 shows a conventional working/standby switching circuit for this type of radio. In the figure, 1 and 2 are the active and backup transmitters, respectively, 1-1 and 2-1 are the transmission output detection circuits of the active and backup transmitters, respectively, and 3 is the transmitter 1 or 2 that is normal based on the transmission output detection signal. It is determined whether or not, and according to this determination, the relay coil 4
The determination/control unit 4-1 is a relay contact, and the transmitter connected to the antenna 5 is switched from active to standby in response to a control signal from the determination/control unit 3. Reference numerals 1-2 and 2-2 denote transmission command determination circuits, which operate the active transmitter 1 or standby transmitter 2, respectively, based on a signal from the determination/control section 3 and a signal from the transmission command generation section 6. The transmission command from the transmission command generation unit 6 is received information from a receiver (not shown) in the case of a relay station, and corresponds to, for example, a closed contact signal of a handheld microphone in the case of a terminal station.

Next, the operation of the working/standby switching circuit having such a configuration will be explained. Now, if a transmission command is issued by the transmission command generation unit 6, and the determination/control unit 3 determines that the working transmitter 1 is normal, the determination/control unit 3 sends a signal to the transmission command determination circuit 1-2. transmitter 1 and operate the working transmitter 1. Here, if the working transmitter 1 has some kind of failure, the transmission output detection circuit 1-1 detects the abnormality and sends an abnormality detection signal to the judgment/control unit 3, and the judgment/control unit 3 1
Control is performed to switch from the transmitter to the standby transmitter 2. That is,
A current is applied to the relay coil 4 and the relay contact 4-1 is switched to the backup transmitter 2 to connect the antenna 5 to the backup transmitter 2. At the same time, the transmission command determination circuit 2-
2 control signal to operate the standby transmitter 2.
On the other hand, even if the transmission command is no longer received from the transmission command issuing unit 6 and the backup transmitter 2 stops operating, the determination/control unit 3 memorizes the previous state and continues to supply current to the relay coil 4, so that the relay contact 4 -1, the backup transmitter 2 remains connected to the antenna 5. Therefore, even if there is no transmission command from the transmission command generation unit 6, that is, in the reception state or standby state, the relay coil 4
will consume power, and its value is usually
It reaches about 1.1W.

By the way, in recent years, wireless stations and relay stations are often installed in mountainous areas where it is difficult to draw power lines, and in such places, methods of receiving power from solar cells are used. Since the cost is still high, the size of electricity consumption will have a direct impact on the construction cost. In addition, since the time in the receiving state or standby state of radio equipment or relay stations is much longer than the time in the transmitting state, the power consumption during the receiving state or standby state will affect the overall power consumption. Become. Currently, receivers can use power consumption of about 0.19W per unit, and about 0.38W for working and standby combined, but in the conventional working/standby switching circuit described above, the transmitter is in the transmitting or standby state. Since the 1.1 W of power consumed by the relay coil 4 is added to the communication device, the communication device as a whole consumes a large amount of power, resulting in disadvantages such as being uneconomical.

In view of the above-mentioned problems found in conventional devices, the present invention has been developed to change the operation of the make-side contact of the relay that switches and connects the working and standby transmitters to the antenna in response to a control signal, as well as the transmission command to the transmitter. The feature is that the power consumption by the relay coil in the reception or standby state is eliminated by synchronization, and its purpose is to reduce power consumption and make it extremely economical for current use.
The purpose is to provide a standby switching radio. Hereinafter, the present invention will be explained with reference to the drawings.

FIG. 2 shows an embodiment of the present invention, in which the same components as those in FIG. 1 showing the conventional example are denoted by the same reference numerals. That is, the feature of the present invention is that a gate circuit 7 is inserted between the determination/control section 3 and the relay coil 4, and the other configuration is exactly the same as that in FIG. 1. This gate circuit 7
generates an output and operates the relay coil 4 only when the control signal from the determination/control unit 3 and the transmission command from the transmission command generation unit 6 are both input.

Therefore, even if the standby transmitter 2 is selected due to an abnormality in the working transmitter 1, the signal from the determination/control unit 3 is input to the input side of the gate circuit 7 in the reception or standby state where there is no transmission command. Since no transmission command is input from the transmission command generating section 6, the relay coil 4 does not operate and the power consumption by the relay coil 4 becomes zero. On the other hand, in the transmitting state, the signal from the determination and control section 3 as well as the transmission command from the transmission command generation section 6 are input to the gate circuit 7, so the relay coil 4 operates, the relay contact 4-1 switches, and the antenna 5 Connect backup transmitter 2 to. Other operations are similar to those of the conventional example described above.

In this way, even when the backup transmitter 2 is selected, there is no power consumption in the relay coil 4 during reception or standby mode, so power consumption at the wireless station or relay station can be reduced. be.

In the above embodiment, the gate circuit 7 was provided separately from the judgment/control section 3, but the function of the gate circuit 7 is added to the judgment/control section 3 and the transmission command is added to the judgment/control section 3. Good too.

As explained above, according to the present invention, there is a means for synchronizing the make-side contact operation of the relay that switches and connects the working and standby transmitters to the antenna in response to a control signal, with the transmission command to the transmitter. Even if a backup transmitter is selected in response to a control signal due to an abnormality in the transmitter, the relay does not operate in the reception or standby state where there is no transmission command to the transmitter, and therefore the relay coil is consumed. Since it can use no electricity, the power consumption of the entire radio can be saved, and it is practical when operating this type of radio using a solar power source, etc. even in mountainous areas where it is difficult to draw power lines. The above effects are extremely noticeable.

[Brief explanation of the drawing]

The drawings are provided to explain the present invention. Fig. 1 is a block diagram of a working/standby switching circuit of a conventional radio device, and Fig. 2 is a block diagram of a working/standby switching circuit of a radio device showing an embodiment of the present invention. It is a block diagram. 1, 2... Working and backup transmitters, 1-1, 2-
DESCRIPTION OF SYMBOLS 1... Transmission output detection circuit, 1-2, 2-2... Transmission command determination circuit, 3... Judgment control unit, 4... Relay coil, 4-1... Relay contact, 5... Antenna, 6 ...Transmission command generation section, 7...Gate circuit.

Claims (1)

[Scope of utility model registration request] A communication device with a relay that connects the active and standby transmitters to the antenna using a control signal based on an abnormality in one of the transmitters.
A working/standby switching circuit for a communication device, characterized in that the standby switching circuit includes means for synchronizing the make-side contact operation of the relay with a transmission command to a transmitter.